Trolley.



PATENTED JULY 3, 1906.

" J. TETLOW.

TROLLEY..

APPLIOATION FILED APR.19. 1905. RENEWED JAN. 19, 1906.

'IIIIIIIIII/ v I I T- z I WITNESSES: INVENTUN 5m Wfim,

UNITED STATES PATENT OFFICE.

JOSEPH TETLOW, OF SAOO, MAINE, ASSIGNOR TO HERBERT R. JORDAN,

' OF SAOO, MAINE.

TROLLEY.

Specification of Letters Patent.

Patented July 3, 1906.

Application filed April 19, 1905. Renewed January 19, 1906. Serial No. 296,829.

To all 1072,0711, it may concern:

Be it known that I, JosEPH TETLow, a subject of the King of Great Britain, residing at Saco, in the county of York and State of Maine, have invented new and useful Improvements in Trolleys, of which the following is a specification.

My invention relates to im rovements in trolleys, and more particularly to the construction of the running contact and in the method of mounting it in the harp. Its ob jects, among others, are to make a trolley more durable, to lessen the friction of the wearing parts, to enable the contact to accommodate itself to the changes in direction and altitude of the track, and to render it possible to replace the part of the contact more subject to wear without at the same time renewing the sides.

In the drawings herewith accompanying and making a part of this application, Figure 1 is a vertical transverse sectional view of my improved trolley. Fig. 2 is a side view of the central member of the running contact. Fig. 3 is an inside view of one of the side members of the running contact, and Fig. 4 is an end view of the core upon which the running-contact is mounted.

Same letters of reference refer to like parts in all the figures.

In said drawings, Arepresents the body of a harp, B terminals removably secured in any convenient manner-as, for example, by a bolt O passing through the body of the harp and an extension of the terminals. The extension of the terminals is provided with raised sides E, forming a groove or recess F, in which the ends of the body part of the harp lie substantially as shown in Fig. 1. This construction prevents the terminals from turning relative to the harp. The inner faces of the terminals are provided with re cesses G for the reception of a suitable packing of lubricating material H and has an oil-' duct K leading through the terminals into said recesses. The inner faces of the terminals are also provided with ball-receiving races I adjacent to the recesses G. The terminals are held in place by a threaded bonding-rod L. Between the terminals are mounted rotatable disks M, having ball-receiving races O, which when said disks are in proper position cooperate with the corresponding races in the terminals to contain antifriction ball-bearings J. The disks M are provided with central bars S to receiye the ends T of a hollow core U, through which bolt L passes. This core has an enlarged middle portion, as seen at Z in Fig. 4. The inner faces of said disks M are provided with coilspring-receiving recesses V. The running contact is composed of a centralwearing-section X, having laterallyextended projections Y and a bore greater than the core, thus giving entrance of air through the open spaces in the sides of the contact and lessening the danger of the contact becoming overheated. The side members X of the running contact have openings Y therein to give entrance to the projections Y of the central member, whereby the sections are removably interlocked when in the position shown in Fig. 1. The central bore of the side sections is angular, corres onding with the peri hery of the core and 0 such a size as to loosely engage said core, whereby the parts may move laterally, but cannot revolve on said core. The outside faces of the members X have coil spring receiving recesses P therein, which cooperate with the recesses P in the disks in holding therebetween coil-springs Q.

It will be obvious that many of the parts may be varied and still be within the spirit and scope of my invention.

To construct my improved trolley, the central section of the running contact is first placed in position. The sides of the running contact are then placed in position. Next the springs are placed in position against the side sections of the contact. The disks are then placed in position, after which the terminals with the ball-bearings in the races are screwed onto the ends of the bolt which holds the terminals. The terminals are then secured to the body of the harp.

The advantages of my improved trolley are that the parts wear longer, run more easily, and accommodate themselves more readily to the curves and switches in the track. The liability of the trolley to leave the track is lessened by reason of the fact that the side members of the running contact are free to move one relative to the other, being yieldingly held by the springs, and the tendency of the parts to heat is lessened.

Having thus described my invention and its use, I claim- 1. In a trolley, in combination, a harp comprising a body part and terminals removably secured thereto, said terminals being provided with antifriction ball-races and lubricator-pad-receiving recesses in the adjacent sides thereof, antifriction-balls in said races and lubricator-pads in said recesses in contact with said balls, a running contact and means intermediate said contact and an tifriction-balls for supporting said contact in said harp.

2. In a trolley, in combination, a harp comprising a body part and terminals removably secured thereto, said terminals being provided with antifriction-ball races and lubricator-pad-receiving recesses in the adj a-' cent sides thereof, antifriction-balls in said races, lubricatonp'ads in said recesses in contact with said balls, oil-ducts leading through said terminals to said pad-recesses, a running contact and means intermediate said contact and balls for supporting said contact in said 3? In a trolley, in combination, a harp comprising a body part and terminals removably secured thereto, said terminals be ing provided with antifriction-ball races and lubricator-pad-receiving recesses in the sides thereof, antifriction-balls in said races, lubricator-pads in said recesses in contact with said antifriction-balls, disks having ball-receiving races in the outside thereof and springreceiving recesses in the adjacent sides thereof, afhollow core supported in said disks, a running contact comprising a plurality of sections mounted on said core, springs interposed between said contact and said disks and a bonding-rod passing through said ter- I minals, disks and core.

said disks and having an enlarged central section, a running contact comprising a plurality of sections mounted on said core, said sections being free to move laterally on said core but incapable of rotation thereon, springs interposed between said contact and said disks and a bonding-rod passing through said terminals, disksand core.

In testimony whereof I have signed this specification, in presence oftwo subscribing witnesses, this 5th day of April, A. D. 1905.

J OSEPH TETLOl/V In presence of- LUTHER R. MooN, ALIcE M. HANscoM. 

